Multichannel SQUID magnetometers are being developed for signal-field mapping in biomagnetic experiments. A problem that becomes more serious as the number of channels is increased is the crosstalk caused by the mutual inductances between the individual sensing coils. A simple and effective method for eliminating this crosstalk is presented in this Paper. The method is based on a rearrangement of the feedback loops which causes the flux-transformer circuits to become currentless. The feasibility of the method is verified experimentally.
- magnetic fields
ter Brake, H. J. M., Fleuren, F. H., Ulfman, J. A., & Flokstra, J. (1986). Elimination of flux-transformer crosstalk in multichannel SQUID magnetometers. Cryogenics, 26(12), 667-670. https://doi.org/10.1016/0011-2275(86)90166-9